﻿#region License

//===================================================================================
//Copyright 2010 HexaSystems Corporation
//===================================================================================
//Licensed under the Apache License, Version 2.0 (the "License");
//you may not use this file except in compliance with the License.
//You may obtain a copy of the License at
//http://www.apache.org/licenses/LICENSE-2.0
//===================================================================================
//Unless required by applicable law or agreed to in writing, software
//distributed under the License is distributed on an "AS IS" BASIS,
//WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
//See the License for the specific language governing permissions and
//limitations under the License.
//===================================================================================

#endregion

using System.Collections.Generic;

namespace System.Linq
{
    public static class PagingExtensions
    {
        public static IQueryable<T> Page<T>(this IQueryable<T> query, int pageNumber, int pageSize)
        {
            if (pageNumber <= 0)
                throw new ArgumentException("pageNumber");

            return query.Skip<T>(((pageNumber - 1) * pageSize)).Take<T>(pageSize);
        }

        public static IEnumerable<T> Page<T>(this IEnumerable<T> query, int pageNumber, int pageSize)
        {
            if (pageNumber <= 0)
                throw new ArgumentException("pageNumber");

            return query.Skip<T>(((pageNumber - 1) * pageSize)).Take<T>(pageSize);
        }

    }
}
